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Accounts Receivable, net - Additional Information (Detail) (Receivable Sales Agreement [Member])	9 Months Ended
	Sep. 30, 2014
Receivable Sales Agreement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract period	The term of this agreement matures in August 2015, with renewal options, but either party has an option to terminate the agreement pursuant to the terms of the agreement
Contract terms	Receive payment from the Bank no later than one business day after the Bank's acceptance of EDC's offer to sell the accounts receivables

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- Definition

Initial term of this agreement is for one year, with renewal options, but either party has an option to terminate the agreement pursuant to the terms of the agreement.

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- Definition

The terms relating to contract.

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